Optimization analysis for maximizing the total profit of an automated assembly system consisting of automated assembly machines and operators was performed. In this analysis, concepts of two kinds of breakdowns, which depend on accuracy of parts and on machine running speed were introduced. Based on basic decision variables—accuracy of parts, machine running speed, and number of operators, profit rate of the automated assembly system was maximized through dynamic programming, and an optimizing algorithm for the maximum profit rate was developed with a numerical example.

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